She will catch 4 fish, and go home. Of the fish in the lake, 1/4 are Trout, and the rest are Bass. Assume that there are lots of them in the lake and that the Trout are as easy to catch as the Bass.

1. Find the probability that exactly half of the fish that are caught will be Trout.

2. Find the probability that one or more Trout will be caught.

3. Find the expectation of the number of the Truout out of 4 fish she has caught.

4. Find the standard deviation of the number of Trout out of 4 fish she has caught.